Phylum Porifera Grant, 1836 - sponges
   Class Calcarea Bowerbank, 1864 - calcareous sponges
     Order †Sphaerocoelida Vacelet, 1979 see Order Sphaerocoeliida Vacelet, 1979
       1 Family †Sphaerocoeliidae Steinmann, 1882
       2 Family Minchinellidae Dendy & Row, 1913